Diego Vázquez, professor of history at the University of Compostela, travels to Cartagena to the funeral of his former friend and thesis tutor Jaime Fuentes. There he meets Sonia, daughter of the deceased, who gives her some books That Fuentes was working with at the time of her death.
When he plans to return home, at the train station, Vazquez is caught by a thief, who takes his books, forcing him to file a complaint and stay another day in the city.
A second robbery, this time in the late professor's home, will lead Vázquez and Sonia to resume the investigation left unfinished by his father, rebuilding the last week of Jaime Fuentes' life with the help of his personal agenda.
The indications and riddles left by the former tutor will lead you to visit different archaeological remains of the city of Cartagena, embarking on an adventure full of mysteries and conspiracies, where you will discover that history is perhaps not as you have been told.